Loses connection to USB

LightBurn Hardware Compatibility GRBL
1

Hello. My homemade CO2 laser cutter was working perfectly until today. When cutting, the machine stops and that’s it, then I repeat the process and it inevitably stops somewhere again. The USB cable is plugged in securely. Please tell me, why is it losing the USB connection?

Thanks

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2

Most of the explanations are in the image you show, or better said in the reference it offers. You could start there.

3

In addition to @bernd.dk’s suggestion, the Troubleshooting guide may help:

Basically:

  • USB was never intended for use in machines switching high currents
  • Consumer-grade controllers tend to have overly delicate circuitry that’s easily perturbed by EMI

The shortest, most robust high-quality cable with ferrite cores tends to solve many problems. Anything over about a meter seems to require an active repeater cable and anything over two meters works better (or at all) with power injection at the controller end.

Some previous discussions shed light on the problem:

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